A versatile optode system for oxygen, carbon dioxide, and pH measurements in seawater with integrated battery and logger.

Staudinger, Christoph, Strobl, Martin, Fischer, Jan P., Thar, Roland, Mayr, Torsten, Aigner, Daniel, Müller, Bernhard J., Müller, Bernhard, Lehner, Philipp, Mistlberger, Günter, Fritzsche, Eva, Ehgartner, Josef, Zach, Peter W., Clarke, Jennifer S., Geißler, Felix, Mutzberg, André, Müller, Jens D., Achterberg, Eric P. , Borisov, Sergey M. and Klimant, Ingo (2018) A versatile optode system for oxygen, carbon dioxide, and pH measurements in seawater with integrated battery and logger. Open Access Limnology and Oceanography: Methods, 16 (7). pp. 459-473. DOI 10.1002/lom3.10260.

[img]
Preview
Text
Staudinger_et_al-2018-Limnology_and_Oceanography%3A_Methods.pdf - Published Version
Available under License Creative Commons: Attribution 4.0.

Download (1114Kb) | Preview

Supplementary data:

Abstract

Herein, we present a small and versatile optode system with integrated battery and logger for monitoring of O-2, pH, and pCO(2) in seawater. Three sensing materials designed for seawater measurements are optimized with respect to dynamic measurement range and long-term stability. The spectral properties of the sensing materials were tailored to be compatible with a commercially available laboratory oxygen logger that was fitted into a pressure housing. Interchangeable sensor caps with appropriate "sensing chemistry" are conveniently attached to the end of the optical fiber. This approach allows using the same instrument for multiple analytes, which offers great flexibility and minimizes hardware costs. Applications of the new optode system were demonstrated by recording depth profiles for the three parameters during a research cruise in the Baltic Sea and by measuring surface water transects of pH. The optode was furthermore used to monitor the concentration of dissolved oxygen in a seagrass meadow in the Limfjord, Denmark, and sensor packages consisting of pO(2), pH, and pCO(2) were deployed in the harbors of Kiel, Germany, and Southampton, England, for 6 d. The measurements revealed that the system can resolve typical patterns in seawater chemistry related to spatial heterogeneities as well as temporal changes caused by biological and tidal activity.

Document Type: Article
Keywords: M-CRESOL PURPLE; AZA-BODIPY DYES; IN-SITU; OCEAN-ACIDIFICATION; PCO(2) SENSOR; SEA-WATER; PARTIAL-PRESSURE; HIGH-PRECISION; CO2 SENSOR; BALTIC SEA
Research affiliation: OceanRep > GEOMAR > FB2 Marine Biogeochemistry > FB2-CH Chemical Oceanography
Refereed: Yes
Open Access Journal?: No
DOI etc.: 10.1002/lom3.10260
ISSN: 1541-5856
Related URLs:
Projects: PINBAL
Date Deposited: 31 Aug 2018 08:30
Last Modified: 01 Feb 2019 15:04
URI: http://oceanrep.geomar.de/id/eprint/44089

Actions (login required)

View Item View Item

Document Downloads

More statistics for this item...